3. In the lab you use the gram staining procedure, a differential staining techn

Question

3. In the lab you use the gram staining procedure, a differential staining technique, as a first step in identifying the type of bacteria on a slide. After you carefully perform the staining procedure, you look at the cells under the microscope and see pink rod shaped cells. This result indicates that

a. the cells have a thick peptidoglycan layer as part of the physical structure of the cell wall and are gram-positive bacilli.

b. the cells have a thin peptidoglycan layer as part of the physical structure of the cell wall and are gram-positive bacilli.

c. the cells have a thin peptidoglycan layer as part of the physical structure of the cell wall and are gram-negative cocci.

d. the cells have a thin peptidoglycan layer as part of the physical structure of the cell wall and are gram-negative bacilli.

e. the cells have a thick peptidoglycan layer as part of the physical structure of the cell wall and are gram-negative bacilli.

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4. Which of the following infectious diseases has (or have) been eradicated in the world?

a. polio

b. measles

c. smallpox

d. whooping cough

e. all of the above

Explanation / Answer

3. the cells have a thin peptidoglycan layer as part of the physical structure of the cell wall and are gram-negative cocci.

4. e. all of the above.

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